漳州龙师井水氡观测恒温脱气方法实验

Experiment on the application of thermostatic deaeration method in well water radon observation in Longshi of Zhangzhou

利用恒温水浴仪可以控制水氡样品的温度保持恒定,在恒温条件下进行脱气观测,可以保证水氡测值的稳定性。为验证该方法是否适用于漳州龙师井(水温年均值97℃)水氡观测,将同一水样,利用恒温水浴仪,将水温分别控制在20.0℃、22.5℃、25.0℃、27.5℃、30.0℃,进行一系列比测实验,结果表明:在25.0℃—27.5℃的恒温条件下,氡浓度测值更为稳定,变化更小,可进一步提高水氡观测的质量和稳定性,说明在龙师井采用恒温脱气方法是可行的。

Constant temperature water bath instrument can keep the temperature of water radon sample constant.Deaeration under a constant temperature condition can guarantee the stability of the measurement of water radon.To verify whether this method is suitable for the water radon observation in Longshijing,Zhangzhou(annually average water temperature is 97℃),we take the same water sample and utilize the constant temperature water bath instrument to keep the water temperature at 20.0℃,22.5℃,25.0℃,27.5℃and 30.0℃,respectively to carry out a series of contrast test experiments.The results show that measured radon potency is more stable under 25.0℃—27.5℃constant temperature conditions with smaller changes and is able to further improve the quality and stability of water radon observation,indicating that it is feasible to adopt the constant temperature degas method in Longshijing.